bipinnate, compound, pinnate
June - November
0.9 - 3.8
Similar to E. compositifolium but has finer pubescence, leaf segments 0.5 mm broad (1-2 mm or narrower in E. compositifolium) and an achene that is 1 mm long (those of E. compositifolium are 1.5-2 mm long). The inflorescence of E. capillifolium is a long panicle that is lax or nodding, while the inflorescence of E. compositifolium is generally erect. Eupatorium capillifloium is more widespread in Louisiana but E. compositifolium is usually more abundant on dry sandy soils. Of all the Eupatoriums that occur in Louisiana E. capillifolium has the most heads in its inflorescence.
The seeds of most species of Eupatorium benefit from cold/dry stratification (Steffen 1997).
This plant is not eaten by livestock. The seeds of several species of Eupatorium are eaten by birds.
The Acadian French name "anis marron" refers to the anise-like smell of the dried foliage. In Louisiana this species is found to be a perennial, whereas in the northeastern United States, it may be an annual or perennial (Radford et al 1968).
Open places, often in old fields and pastures.